—I would like to buy an expensive camera.

—Well, we have several models_____ .

A. to choose from   　　B. to choose

C. to be chosen     　　 D. for choice

Unexpected difficulties ____in the course of their experiment.

A. arises　　　 B. were arising　　　 C. arose　　　 D. were arisen

The teacher together with the students ___________ discussing Reading Skills that _______ newly published in America.

A. are; were　　　 　 B. is; were　　　 　 C. are; was　　　 　 D. is; was

______ has taken away my notebook?
A. Which of you    B. Who of you     C. Which you       D. Who you

She’s passed the test. ________.

A. So am I　 　 B. So have I

C. So I have 　 D. So do I

Because of the heavy traffic，it was already time for lunch break　　　　 she got to her

office．

　 A．since　 B．that　 C．when　　 D．until

Each boy and each girl ___ the right to get entertainment and support in his or her childhood.

A. is b. has c. are d. have

He looks so upset. I ___ him the truth.

A. should have told B. should tell　　　　　 C. shouldn’t have told D. shouldn’t tell

Either you or one of your students ______ to attend the meeting that is due tomorrow.
A. are  B. is  C. have  D. be

With the help of high technologh，more and more new substances________in the past years.

A．discovered 　　　　　 B．have discovered

C．had been discovered 　 D．have been discovered